package com.example.java_gobang.game;

import com.example.java_gobang.JavaGobangApplication;
import com.example.java_gobang.model.User;
import com.example.java_gobang.model.UserMapper;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;

import java.io.IOException;
import java.util.UUID;

/**
 * @author krystal
 * @date 2023/3/12 20:58
 */
//这个类就表示一个游戏房间
public class Room {
    //使用字符串来表示，方便生成唯一值
    private String roomId;

    private User user1;
    private User user2;

    //先手方的玩家id
    private int whiteUser;

    private static final int MAX_ROW=15;
    private static final int MAX_COL=15;
    //二维数组用来表示棋盘
    //使用0表示当前位置未落子
    //使用1表示user1的落子位置
    //使用2表示user2的落子位置
    private int[][] board=new int[MAX_ROW][MAX_COL];

    //创建objectMapper用来转换JSON
    private ObjectMapper objectMapper=new ObjectMapper();

    @Autowired
    private OnlineUserManager onlineUserManager;

    //引入roommanager，用于房间销毁
    @Autowired
    private RoomManager roomManager;

    @Autowired
    private UserMapper userMapper;

    //通过这个方法来处理一次落子操作
    public void putChess(String reqJson) throws IOException {
        //1、记录当前落子的情况
        GameRequest request=objectMapper.readValue(reqJson,GameRequest.class);
        GameResponse response=new GameResponse();
        //判断当前是玩家1落子还是玩家2
        int chess=request.getUserId()==user1.getUserId()?1:2;
        int row= request.getRow();
        int col= request.getCol();
        if (board[row][col]!=0){
            System.out.println("当前位置("+row+","+col+")已经有子了！");
            return;
        }
        board[row][col]=chess;
        //2、打印出当前的棋盘信息
        printBoard();
        //3、进行胜负判定
        int winner=checkWinner(row,col,chess);
        //4、给客户端返回响应
        response.setMessage("putChess");
        response.setUserId(request.getUserId());
        response.setRow(row);
        response.setCol(col);
        response.setWinner(winner);
        //要想给用户发送websocket数据，就要获得这个用户的websocketSession
        WebSocketSession session1=onlineUserManager.getFromGameRoom(user1.getUserId());
        WebSocketSession session2=onlineUserManager.getFromGameRoom(user2.getUserId());
        if (session1==null){
            response.setWinner(user2.getUserId());
            System.out.println("玩家1掉线！！！");
        }
        if (session2==null){
            response.setWinner(user1.getUserId());
            System.out.println("玩家2掉线！！！");
        }
        //把响应构造成Json字符串，通过session进行传输
        String respJson=objectMapper.writeValueAsString(response);
        if (session1!=null){
            session1.sendMessage(new TextMessage(respJson));
        }
        if (session2!=null){
            session2.sendMessage(new TextMessage(respJson));
        }
        //5、如果当前胜负已分，就把room从管理器中销毁
        if (response.getWinner()!=0){
            System.out.println("游戏结束！房间即将销毁！roomId="+roomId+"获胜方为"+response.getWinner());
            int winUserId=response.getWinner();
            int loseUserId=response.getWinner()==user1.getUserId()?user2.getUserId():user1.getUserId();
            userMapper.userWin(winUserId);
            userMapper.userLose(loseUserId);
            //销毁房间
            roomManager.remove(roomId,user1.getUserId(),user2.getUserId());
        }
    }

    private void printBoard() {
        //打印出棋盘
        System.out.println("打印棋盘信息"+roomId);
        System.out.println("======================");
        for (int r=0;r<MAX_ROW;r++){
            for (int c=0;c<MAX_COL;c++){
                System.out.print(board[r][c]+" ");
            }
            System.out.println();
        }
        System.out.println("======================");
    }

    //如果玩家1获胜就返回玩家1的userId
    //胜负未分返回0
    private int checkWinner(int row, int col,int chess) {
        //1、检查所有的行
        //先遍历这五种情况
        for (int c=col-4;c<=col;c++){
            //针对其中一种情况，来判断这五个子是不是连在一起
            try {
                if (board[row][c]==chess
                        && board[row][c+1]==chess
                        && board[row][c+2]==chess
                        && board[row][c+3]==chess
                        && board[row][c+4]==chess){
                    return chess==1?user1.getUserId():user2.getUserId();
                }
            }catch (ArrayIndexOutOfBoundsException e){
                continue;
            }
        }

        //2、判定所有列
        for (int r=row-4;r<=row;r++){
            //针对其中一种情况，来判断这五个子是不是连在一起
            try {
                if (board[r][col]==chess
                        && board[r+1][col]==chess
                        && board[r+2][col]==chess
                        && board[r+3][col]==chess
                        && board[r+4][col]==chess){
                    return chess==1?user1.getUserId():user2.getUserId();
                }
            }catch (ArrayIndexOutOfBoundsException e){
                continue;
            }
        }

        //3、左对角线
        for (int r=row-4,c=col-4;r<=row && c<=col;r++,c++){
            //针对其中一种情况，来判断这五个子是不是连在一起
            try {
                if (board[r][c]==chess
                        && board[r+1][c+1]==chess
                        && board[r+2][c+2]==chess
                        && board[r+3][c+3]==chess
                        && board[r+4][c+4]==chess){
                    return chess==1?user1.getUserId():user2.getUserId();
                }
            }catch (ArrayIndexOutOfBoundsException e){
                continue;
            }
        }

        //4、右对角线
        for (int r=row-4,c=col+4;r<=row && c>=col;r++,c--){
            //针对其中一种情况，来判断这五个子是不是连在一起
            try {
                if (board[r][c]==chess
                        && board[r+1][c-1]==chess
                        && board[r+2][c-2]==chess
                        && board[r+3][c-3]==chess
                        && board[r+4][c-4]==chess){
                    return chess==1?user1.getUserId():user2.getUserId();
                }
            }catch (ArrayIndexOutOfBoundsException e){
                continue;
            }
        }
        return 0;
    }

    public int getWhiteUser() {
        return whiteUser;
    }

    public void setWhiteUser(int whiteUser) {
        this.whiteUser = whiteUser;
    }

    public String getRoomId() {
        return roomId;
    }

    public void setRoomId(String roomId) {
        this.roomId = roomId;
    }

    public User getUser1() {
        return user1;
    }

    public void setUser1(User user1) {
        this.user1 = user1;
    }

    public User getUser2() {
        return user2;
    }

    public void setUser2(User user2) {
        this.user2 = user2;
    }

    public Room(){
        //构造Room的时候生成一个唯一的字符串来表示房间id
        //使用UUID来作为房间id
        roomId= UUID.randomUUID().toString();
        //通过入口类中记录的context来手动获取到前面的RoomManager和OnlineUserManager
        onlineUserManager= JavaGobangApplication.context.getBean(OnlineUserManager.class);
        roomManager=JavaGobangApplication.context.getBean(RoomManager.class);
        userMapper=JavaGobangApplication.context.getBean(UserMapper.class);
    }
}
